莎稗磷乳油防除杂草对水稻移栽田光照和水肥的影响

Effect of Weed Control by Using Anilofos EC on Sunlight,Nutrition and Moisture in Transplanted Rice Field

研究了300 g/L莎稗磷乳油对水稻移栽田主要杂草的防除效果、杂草防除后田间不同高度层的透光率变化以及杂草水肥含量变化规律。结果表明,施用300 g/L莎稗磷乳油对移栽稻田中杂草的防除效果显著,综合密度防除效果和综合鲜重防除效果分别为90.96%～100.00%和91.31%～100.00%;有效防除杂草后,田间透光率亦显著提高,在水稻顶部冠层(距地表100 cm处)的透光率达到88.65%以上;同时有效地降低杂草的株数和鲜重,各个处理区杂草的水肥含量极显著降低;杂草防除有效改善水稻田间光照和水肥条件,增产效果显著。

The control effect of 300 g/L anilofos EC on the main weeds in the transplanted rice field was studied,and the changes in sunlight penetration rate at different heights in the field as well as the nutrition and moisture contents of the weeds after weed control were analyzed.The results showed that 300 g/L anilofos EC had good control effects on the weeds in the transplanted rice field,the integrated density control effects on weeds ranged from 90.96% to 100.00%,and the integrated fresh-weight control effects varied from 91.31% to 100.00%.The sunlight penetration rate was significantly improved by the effective control of weeds,and the sunlight penetration rate at the top of the rice canopy（100 cm above earth＇s surface） was more than 88.65%.The number of plants and fresh weight of weeds were reduced effectively,and the contents of moisture and nutrition in the weeds were significantly decreased in all treatments.Weed control could effectively improve the sunlight,nutrition and moisture in rice field,and had remarkable increasing effect on rice yield.